The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 2013
Filed:
Jul. 11, 2007
Hajime Tsukahara, Kanagawa, JP;
Tohru Kanno, Kanagawa, JP;
Hajime Tsukahara, Kanagawa, JP;
Tohru Kanno, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image reading signal processing IC includes three circuits which independently process input analog image signals of three primary colors. Each circuit includes an ADC which converts amplified analog image signals into digital image data. Each circuit also includes an LVDS processing circuit which outputs the digital image data in a low voltage differential signaling level. Each circuit further includes a test pattern generating circuit connected between the ADC and the LVDS processing circuit for generating digital data of a test pattern. The image reading signal processing IC additionally includes an operational mode determination information input unit which inputs operational mode determination information to the test pattern generating circuit. Further, the image reading signal processing IC includes a switching unit which switches one of the digital data of the test patterns to any one or more of main scanning direction gradation pattern data and sub scanning direction gradation pattern data.